Dispersion strengthened metal composites

A substantially fully dense compacted and unsintered powdered metal composite, comprising:

• (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a refractory metal, refractory metal alloy or refractory metal compound selected to thereby impart to the composite a controlled coefficient of expansion.

A substantially fully dense compacted and unsintered powdered metal composite, comprising:

• (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a refractory metal, refractory metal alloy or refractory metal compound selected to thereby impart to the composite a high strength.

A substantially fully dense compacted and unsintered powdered metal composite, comprising:

• (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a refractory metal, refractory metal alloy or refractory metal compound selected to thereby impart to the composite a high wear resistance.

A substantially fully dense compacted and unsintered powdered metal composite, comprising:

• (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a mechanical or physical property-conferring material having mechanical or physical parity with component (a).

A process for forming a substantially fully dense compacted and unsintered powdered metal composite, comprising compacting without sintering:

• (a) a metal or metal alloy matrix having uniformly dispersed therein discrete microparticles of a refractory metal oxide and (b) discrete macroparticles of a mechanical or physical property-conferring material having mechanical or physical parity with component (a).